Controlling-switch.



PATIJTED 18, 1906.

H. P, BALL.

CONTROLLING SWLTCH' APPLICATION FILED FEB. 23, 1905.

2 SHEETSSHBET 1.

lnvcrwow", Henry P. Ball. J;

PATENTED SEPT. 18, 1906.

. BAL

GGNTROLLING SWITCH APPLICATION FILED r EB. 23,1905 v 2 SHEETSSHEET 2vInvenkon WHnesses;

UNITED STATES PATENT OFFIGE.

HENRY PRICE BALL, OF NEW YORK, N. Y., .ASSIGNOR'TO GENERAL ELECTRICCOMPANY, A CORPORATION OF NEW YORK.

coN-rnoLu'NeswrrcH.

Specification of Letters Patent.

Patented Sept. 18, 1900.

Application filed February 23, 1905- Serial No. 246,818. I

invented certain new and useful Improvements in Controlling Switches, ofwhich the following is a specification.

The present invention relates generally to switching apparatus for thedistant control of electric motors, and more particularl to theconstruction of the control-switch an its circuit connections.

The invention is particularly designed for the control of motor-actuatedswitches such as are employed in breaking high-potential circuits; butit should not be limited to this specific application, since it iscapable of use under other circumstances where the motor is to beoperated intermittently each time to perform a definite work or toproduce a definite range of movement.

In carrying out the invention a double throw contro -switch is connectedso as to control a circuit through two arallel branches leading to themotor to e controlled, and other switching mechanism is included inthese branches and operated by the motor to close the circuit throughone branch and open it through the other at the end of a definite rangeof movement. With this arrangement the circuit through the motor can becompleted only by throwing the control-switch to the proper contacts,and to.

be best understood upon referenceto the fol-- lowmg detaileddescription, taken in connection with the accompan drawings, and itsnovelty will be spec1fica ly pointed out in the appended claims.

In said drawings, Fi e 1 is a front elevation of the control-swltch.Fig. 2 is a side elevation of the same, showin parts in section; Fig. 3,a rear view of 5m same,

and

Fig. 4 is a diagram illustrating the connec' tions of said switch withthe motor and its accompanying control mechanism.

Throughout the views like characters refer to like parts.

Referring to the control switch, 10 designates a suitable sup 'ort, suchas an insulating-panel of a 'switc board, upon which thecontrol-switch-is mounted,'and 1l 11 and v 12 12 designate the fixedswitch-contacts, which are mounted on an insulating block'or support 13,located at the rear of the anel 10, and secured to a spider 14 bysuitable bolts 15. This s ider is in turn secured to a thimble 16, whicextends through an aperture in t e support 10 and terminates at itsfront in hreaded en agement with the faceplate 17, which is hefd againstmovement by suitable bolts 18. The contacts 11 11' and 12 12. areadapted to be connected by a brid g contact 19, secured to an insulatln'bloc dr head 20, mounted on the rear end 0 a rod 21, which extendsthrough the thimble 16 toward the front of the support 10. The forwardend of the rod 21 is connected by a link 22 to the end of anoperating-lever 23', whichis pivoted at the point 24 to a swiveledsupport 25, which comprises a tubular portion 26, which extends into thethimble 16,

and two laterally-projecting arms 27, to the outer ends of which theoperatingrl'ever 231s pivoted. This lever, which is provided with ahandle '28, when rotated with its support 25 causes the bridgin contact19 to be similarly rotated, and the movement of the parts in eitherdirection is limited by the engagement of the projection 29 on the lever23 with the limitin -stops 30, mounted on the face-plate 17. 'l hesestops are located so as to stoprotation when the bridgingcontact hasreached a position in line with either set of contacts 11 11 or 12 12.It will be noted that this rotation of the operating-lever does notbring the switch-contacts lnto engagement, because of the length of theconnecting-rod 21 and its connectlng-link 22. To bring about thisengagement, the operating-lever 23 is rocked about lts pivot 24 towardthe support 10, so. as to bring the handle 28 to the dotted-lineposition shown in Fig. 2. In order to prevent this movement except whenthe bridging contact 19 is in line with either set of fixed contacts,the space between the stops 30 ontheface-plate 18 is provided with aprojecting rib 3 1 ,which engages the projection 29 on the operatin-lever and prevents its movement into the (fitted-line position. Thisrib does not extend the entire distance 5 between the stops 30, butstops short thereof, leaving a slot or depression adjacent each stop forthe assage of the projection 29 when the hen le 28 is forced inward. Toreturn the contact 19 to its 0 en osition, a coiled spring 32 is provideis sprin bears at one end against the spider 14 an at the other againstan armature 33, which abuts the insulating-head 20. The armature 33 iscomposed of suitable magnetic ma- 1 5 terial and cooperates with theelectromagnet 34 to hold the switch-contacts inenga ement without thecontinued application of orce to the operating-lever 23,

2 5. Referring to the diagram shown in Fig. 4,

the contacts 11" 12v are connected in series with the coil 36 and to oneleg 38 of the supply-circuit; The other contacts 11 and 12 areconnected, respectively, in series with indicator-lamps 39 and 40 to acommon lead 41,

also connected to the leg 38 of the supply-circuit. A suitableresistance 42 is interposed in the lead 41, so as to cut down thecurrent to an amount suitable for the indicator- 3 5 lamps 39 40. Theother leg 43 of the supplycircuit is connected by a lead 44 to armature45'of the'motor to be controlled, and the. circuit from the armature iscompleted through .the field-winding 46 to the fixed contacts 47' 4o 48of two motor-controlled switches R R,

whose movable elements are electrically connected to the contacts 12 and11, respectively. The switch-blades 49 and 50are controlled by cams 51and 52,'actuated bythe 45 motor-armature 45, and these cams are shapedso as to maintain one switch, as R, open, and the other, as R, closedduring a definite movement of the motor. When this movement iscompleted, the switch R 50 is closed, and substantially simultaneously 1therewith the switch R is opened. With this organization it will be seenthat there isalways one circuit com leted through the motor, and bythrowing t e control-switch to the 55 proper position the motorv can bestarted to gperate through its given ran e of movement. or instance,assunung that t e parts as. illustrated are at rest, it will be apparentthat if the control-switch is thrown so as to-com- 6 plete the circuitbetween the contacts 11 and 11" a circuit will be' completed from theleg 1 38 of the supply throughthe lead 41, resistance 42, lamp 39,contact 11, through one branch, and from the same leg 38 through the 465branch including the magnet-coil 36 to con- This magnet com-- o prisesan annular core 35 of iron or other suitlever will indicate which waythat" certain alterations and mod ma be made in the matter illustrated 5tact 11, thence to contact 11, where the two branches combine and thecircuit is com- 1 ileted through the switch-contacts 50 48, eld-winding46, armature 45, and lead 44, t0

the other leg of the supplycircuit. This will be sufficient toset the'motor rotating, and as it rotates it will maintain the circuit throu hthe switch R until the cams have'moved ar enough to allow thecontact-arm 50 to drop away and to force the contact 49 into engagement.This will break the motor-circuit, and thus stop the motor and 'at thesame time will leave theother branch circuit in condi-- tion to beclosed b the control-switch. In this operation w e the motor is rotatincurrent will be supplied to the lamp 39, am" as soon as its rotationceases and the contacts 47 and 49 are brought together the lamp 40 willbe lighted. If the motor is designed to o erate a switch S, as isdiafi-ammatically s own, the particular lamp lig ted will ind catewhether or not the switch is open or closed. In this operation when theo erating-lever 23 is thrown to the right or eft in order to bring themovable contact 19 into line with the roper set of fixed contacts and isthen form inward toward the support 10 Y to bring the contacts intoengagement ,the circuit throu h the retaining-magnet coil.,36 will becomp eted, and the armature 33 will 95 be held' agamst the face of themagnet and the contacts maintained in engagement until the motor hascompleted its range of move- 1 ment and the circuit through the coil 36is broken by the switch mechanism controlled 1 by the motor. Theposition of the operatingthe doublethrow switch was'last thrown y itsosition to the right or left and also the con ition of the motormechanism and the switch S b its 5 position relative to' the support 10.en"

.the lever-handle is near the supportee, for

example, inthe dotted-line 'position in Fig.

2it willindicate that the motor is still in olpi eration, and when it ismost distant from t support it will show that the motor has ceased tooperate. 7

To one skilled in the art it willbe a parent iiiizations wit outdeparting from the spirit and scope of the invention. I therefore do notwish to be limited to the specificmatter disclosed, but aim to cover bythe terms of the ap ended claims all such alterations and-mo ifica- I20tions. 1

What I claim as new, and desire to secure by Letters Patent oftheUnitedStates, is

1. The combination with an-electric motor, of two parallel circuitsincluding said mo- 1 2 5' tor, a manual switch'for severally closin saidparallel circuits biased to open when c osed', meansv operated by theclosing of one of said parallel circuits to'hold said switch closed,

and means actuated by the motor tolbreak 1 0 the circuit last manuallyclosed and place the other in condition to be closed by said manualswitch.

2. The combination with an electric mo- 5 tor, of two parallelcircuitsincluding said motor, a manual switch for severally closing saidparallel circuits, a spring normally tending to open said switch, meansoperated by the closing of one of said parallel circuits to hold saidswitch closed against the action of said spring, and means actuated bythe motor to break the circuit last manually closed and place the otherincondition to be closed by said manual switch. i

3. The combination with an electric motor, of two parallel circuitsincluding said motor, a manual switch for severally closing saidparallel circuits biased to open when closed,

electromagnetic means energized by the closmg of one of said parallelcircuits to hold said switch closed, and means actuated. by the motor tobreak the circuit last manually closed and place the other in conditionto be closed by said manual switch.

4. The combination with an electric motor, of two parallel circuitsincluding said motor, a manual switch for severally closing saidparallel circuits, a'spring tending to open said switch, anelectromagnet energized by the closing of one of said parallfll circuitsto hold said switch closed against the action of said spring, and meansactuated b the motor to break the circuit last manua ly closed and placethe other in condition to be closed by said manual switch.

5. Thecombination with a main switch, of an electric motor. foroperating said switch, two parallel circuits including said motor, a

1 manual switch for severally closing said par- 4 allel circuits biasedto open when closed, means operated by the closing of one of saidparallel circuits to hold said switch'closed, means actuated by saidmotor to break the circuit last manually closed and place the othercondition to be closed by said manua l switch, and indicator-lam sincluded in said parallel circuits for showing the conditlon of saidmotor-actuated means and said i main switch.

so a. A double-throw electric switch biased to open when closed,megs-for holding said switch in either closed position for a definitetime, and means for indicating which way the switch was lastthrown.

7. A double-throw electric switch biased to open when closed, means forholding said switch in either closed position for a definite time, andmeans for indicating which way the switch was last thrown and whether itis open or closed.

8. A double-throw electric switch biased to open when closed, means forholding said switch in either closed position, means for releasing saidholding means, and means for indicating which way the switch was lastthrown.

9. A double-throw electric switch biased to open when closed, means forholding said switch in either closed position, means for releasing saidholding means, and means for indicating which way the switch was lastthrown and whether it is open or closed.

10. In an electric switch, the combination with two sets of fixedcontacts, of a cooperat ing movable contact, an operating-lever movablein one direction to bring-said movable contact into line with one set offixed contacts and movable at an angle to said direction to bring saidcontacts into engagement, and means mounted to engage the operatingleverto prevent the latter movement except when said contacts are in line.

' 11. In an electric switch; the combination of fixed and movablecontacts, a rotary reciprocating member carrying the movable contact, amovable support pivoted concentrically with saidunember, and anoperatinglever secured to the end of said member and pivoted at anintermediate point to said suport. p 12. In an electric switch, thecombination with fixed and movable contacts, of a rotary reciprocatingmember carrying the movable contact, a spring tending to maintain saidcontacts out of engagement, and an electromagnet for holding saidcontacts in engage-v g HENRY PRICE BALL.

Witnesses;

HARRY W. PUGH, JULrUs BEUBE'r'.

IOO

